795 resultados para Alonso Avecilla, Pablo


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Fil: Basile, Teresa. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

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Tabla de contenidos: La represión estatal en la historia argentina reciente: problemas, hipótesis y algunas respuestas tentativas / Marina Franco. De la guerra (contrainsurgente): la formación de la doctrina antisubversiva del Ejército argentino (1955-1976) / Esteban Damián Pontoriero. La transformación de las relaciones cívico-militares: la "Acción Cívica" del Ejército (1960-1983) / María Alicia Divinzenso. El proceso represivo en los años setenta constitucionales. De la "depuración" interna del peronismo al accionar de las organizaciones paraestatales / Hernán Merele. Las formas de represión política en el "teatro de operaciones" del Operativo Independencia (Tucumán, 1975-1977) / Santiago Garaño. Formas de exilio y prácticas represivas en la Argentina reciente (1974-1985) / Silvina Jensen, Soledad Lastra. Género y resistencias en la prisión política durante la última dictadura / Débora D'Antoni. Los consejos de guerra militares como práctica de represión política (1956-1983) / Marianela Scocc. La represión a los trabajadores y el movimiento sindical, 1974-1983 / Victoria Basualdo, Alejandro Jasinski. Familia judicial y dictaduras: la creación del "fuero antisubversivo" en la década del 70 / María José Sarrabayrousse Oliveira. Circuitos institucionales y tramas de relaciones sociales: las formas de materialización de la apropiación criminal de niños / Carla Villalta. Esto no es un Holocausto. El testimonio de Jacobo Timerman y la represión a los judíos durante la última dictadura militar / Emmanuel Kahan. Modalidades, dispositivos y circuitos represivos a escala local/regional: Rosario 1975-1983 / Gabriela Aguila. El rol de la "comunidad informativa" en la represión en Bahía Blanca (1975-1977): prácticas, acuerdos y disputas / María Lorena Montero. "¿Para agarrar a este gil semejante despliegue?" La represión dictatorial en el Comahue. Neuquén-Río Negro, 1976-1983 / Pablo Scatizza. Sobre la vida (y a veces la muerte) en una ciudad provinciana. Terror de Estado, cultura represiva y resistencias en Santa Fe / Luciano Alonso. El Cono Sur de las dictaduras, los eslabonamientos nacionales en el interior de la Operación Cóndor y las particularidades del caso argentino / Melisa Slatman.

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This dissertation deals with the nature of the political system in sixteenth-century colonial Spanish America through an analysis of the administration of Viceroy Fernando de Torres y Portugal, Conde del Villar, in Peru (1585–1590). The political conflicts surrounding his government and the accusations of bribery leveled against him and members of his household provide the documentation for a case study in a system in which prestige and authority were defined through a complex network of patronage and personal relationships with the Spanish monarch, the ultimate source of legitimate power. ^ This dissertation is conceptualized using categories presented in Max Weber's theory on the nature of political order and authority in the history of human societies and the definition of the patrimonial system as one in which the power of he king confers legitimacy and authority on the whole political structure. ^ The documentary base for this dissertation is an exceptionally detailed and complete record related to the official administrative review ( visita) ordered by Philip II in 1588 to assess the government of Viceroy Torres y Portugal. Additionally, letters as well as other primary and secondary sources are scattered in repositories on both sides of the Atlantic. ^ The study of this particular case offers an excellent opportunity to gain an understanding of a political order in which jurisdictional boundaries between institutions and authorities were not clearly defined. The legal system operating in the viceroyalty was subordinated to the personal decisions of the king, and order and equilibrium were maintained through the interaction of patronage networks that were reproduced at all levels of the colonial society. ^ The final charges against Viceroy Conde del Villar, as well as their impact on the political career of those involved in the accusations, reveal that situations today understood to constitute bribery had a different meaning in the context of a patrimonial order. ^

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The Hf isotope composition of seawater does not match that expected from dissolution of bulk continental crust. This mismatch is generally considered to be due to retention of unradiogenic Hf in resistant zircons during incomplete weathering of continental crust. During periods of intense glacial weathering, zircons should break down more efficiently, resulting in the release of highly unradiogenic Hf to the oceans. We test this hypothesis by comparing Nd and Hf isotope time series obtained from NW Atlantic ferromanganese crusts. Both isotope systems show a decrease associated with the onset of northern hemisphere glaciation. The observed changes display distinct trajectories in epsilon Nd- epsilon Hf space, which differ from previously reported arrays of bulk terrestrial material and seawater. Such patterns are consistent with the release of highly unradiogenic Hf from very old zircons, facilitated by enhanced mechanical weathering.

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The cores described are taken during the USS San Pablo Cruise 3 from July to August 1949 by the Scripps Institute of Oceanography. A total of 49 cores were recovered and are available at Scripps Institute of Oceanography for sampling and study.

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The cores described are taken during the USS San Pablo Cruises 10 and 11 in 1952 by the Scripps Institute of Oceanography. A total of 21 cores were recovered and are available at Scripps Institute of Oceanography for sampling and study.

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MEGARA (Multi-Espectrógrafo en GTC de Alta Resolución para Astronomía) is an optical Integral-Field Unit (IFU) and Multi-Object Spectrograph (MOS) designed for the GTC 10.4 m telescope in La Palma. MEGARA will be a 3rd generation instrument for GTC. It is led by the University Complutense of Madrid with the collaboration of INAOE, IAA, UPM and comprises more than 50 researchers from a large number of institutions worldwide.

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We present results from the Spitzer Infrared Spectrograph spectral mapping observations of 15 local luminous infrared galaxies (LIRGs). In this paper, we investigate the spatial variations of the mid-IR emission which includes fine structure lines, molecular hydrogen lines, polycyclic aromatic features (PAHs), continuum emission, and the 9.7 μm silicate feature. We also compare the nuclear and integrated spectra. We find that the star formation takes place in extended regions (several kpc) as probed by the PAH emission, as well as the [Ne II]12.81 μm and [Ne III]15.56 μm emissions. The behavior of the integrated PAH emission and 9.7 μm silicate feature is similar to that of local starburst galaxies. We also find that the minima of the [Ne III]15.56 μm/[Ne II]12.81 μm ratio tends to be located at the nuclei and its value is lower than that of H II regions in our LIRGs and nearby galaxies. It is likely that increased densities in the nuclei of LIRGs are responsible for the smaller nuclear [Ne III]15.56 μm/[Ne II]12.81 μm ratios. This includes the possibility that some of the most massive stars in the nuclei are still embedded in ultracompact H II regions. In a large fraction of our sample, the 11.3 μm PAH emission appears more extended than the dust 5.5 μm continuum emission. We find a dependency of the 11.3 μm PAH/7.7 μm PAH and [Ne II]12.81 μm/11.3 μm PAH ratios with the age of the stellar populations. Smaller and larger ratios, respectively, indicate recent star formation. The estimated warm (300 K

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Luminous Infrared (IR) Galaxies (LIRGs, L_IR=10^11-10 L_⨀) are an important cosmological class of galaxies as they are the main contributors to the co-moving star formation rate density of the universe at z=1. In this paper we present a guaranteed time observation (GTO) Spitzer InfraRed Spectrograph (IRS) program aimed to obtain spectral mapping of a sample of 14 local d<76Mpc LIRGs. The data cubes map, at least, the central 20arcsec X 20arcsec to 30 arcsec X 30 arcsec regions of the galaxies, and use all four IRS modules covering the full 5-38 μ m spectral range. The final goal of this project is to characterize fully the mid-IR properties of local LIRGs as a first step to understanding their more distant counterparts. In this paper we present the first results of this GTO program. The IRS spectral mapping data allow us to build spectral maps of the bright mid-IR emission lines (e.g., [Ne II] 12.81 μ m, [Ne III]15.56 μ m, [S III] 18.71 μ m, H_2 at 17 μ m), continuum, the 6.2 and 11.3 μ m polycyclic aromatic hydrocarbon (PAH) features, and the 9.7 μ m silicate feature, as well as to extract 1D spectra for regions of interest in each galaxy. The IRS data are used to obtain spatially resolved measurements of the extinction using the 9.7 μ m silicate feature, and to trace star forming regions using the neon lines and the PAH features. We also investigate a number of active galactic nuclei (AGN) indicators, including the presence of high excitation emission lines and a strong dust continuum emission at around 6 9.7 μ m . We finally use the integrated Spitzer/IRS spectra as templates of local LIRGs. We discuss several possible uses for these templates, including the calibration of the star formation rate of IR-bright galaxies at high redshift. We also predict the intensities of the brightest mid-IR emission lines for LIRGs as a function of redshift, and compare them with the expected sensitivities of future space IR missions.

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El presente trabajo pretende fundamentar un enfoque estratégico para la cooperación en materia de infancia. Para ello se parte de un análisis acerca de las relaciones entre infancia y desarrollo y de un estudio comparado de los enfoques adoptados a nivel internacional. A partir de una metodología elaborada al efecto, se presenta una medición del impacto, directo e indirecto, que la ayuda española tiene en materia de infancia. Y, finalmente, se hace una propuesta de definición estratégica de la política para la infancia en el marco de los sistemas de planificación de la ayuda internacional. Aunque la medición del impacto y la propuesta estratégica se refieren a la cooperación española, la metodología de medición elaborada en este estudio y la argumentación acerca del planteamiento estratégico transcienden al caso español, pudiendo ser generalizadas a otros donantes.

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We show that measures of star formation rates (SFRs) for infrared galaxies using either single-band 24 μm or extinction-corrected Paα luminosities are consistent in the total infrared luminosity = L(TIR) ~ 10^10 L_☉ range. MIPS 24 μm photometry can yield SFRs accurately from this luminosity upward: SFR(M_☉ yr^–1) = 7.8 × 10^–10 L(24 μm, L_☉) from L(TIR) = 5× 10^9 L_☉ to 10^11 L_☉ and SFR = 7.8 × 10^–10 L(24 μm, L_☉)(7.76 × 10^–11 L(24))^0.048 for higher L(TIR). For galaxies with L(TIR) ≥ 10^10 L_☉, these new expressions should provide SFRs to within 0.2 dex. For L(TIR) ≥ 10^11 L_☉, we find that the SFR of infrared galaxies is significantly underestimated using extinction-corrected Paα (and presumably using any other optical or near-infrared recombination lines). As a part of this work, we constructed spectral energy distribution templates for eleven luminous and ultraluminous purely star forming infrared galaxies and over the spectral range 0.4 μm to 30 cm. We use these templates and the SINGS data to construct average templates from 5 μm to 30 cm for infrared galaxies with L(TIR) = 5× 10^9 to 10^13 L_☉. All of these templates are made available online.

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We study the stellar and star formation properties of the host galaxies of 58 X-ray-selected AGNs in the GOODS portion of the Chandra Deep Field South (CDF-S) region at z ~ 0.5-1.4. The AGNs are selected such that their rest-frame UV to near-infrared spectral energy distributions (SEDs) are dominated by stellar emission; i.e., they show a prominent 1.6 μm bump, thus minimizing the AGN emission "contamination." This AGN population comprises approximately 50% of the X-ray-selected AGNs at these redshifts. We find that AGNs reside in the most massive galaxies at the redshifts probed here. Their characteristic stellar masses (M_* ~ 7.8 × 10^10 and M_* ~ 1.2 × 10^11 M_☉ at median redshifts of 0.67 and 1.07, respectively) appear to be representative of the X-ray-selected AGN population at these redshifts and are intermediate between those of local type 2 AGNs and high-redshift (z ~ 2) AGNs. The inferred black hole masses (M_BH ~ 2 × 10^8 M_☉) of typical AGNs are similar to those of optically identified quasars at similar redshifts. Since the AGNs in our sample are much less luminous (L_2–10 keV < 10^44 erg s^−1) than quasars, typical AGNs have low Eddington ratios (η ~ 0.01-0.001). This suggests that, at least at intermediate redshifts, the cosmic AGN "downsizing" is due to both a decrease in the characteristic stellar mass of typical host galaxies and less efficient accretion. Finally, there is no strong evidence in AGN host galaxies for either highly suppressed star formation (expected if AGNs played a role in quenching star formation) or elevated star formation when compared to mass-selected (i.e., IRAC-selected) galaxies of similar stellar masses and redshifts.

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We define a sample of 62 galaxies in the Chandra Deep Field-North whose Spitzer IRAC SEDs exhibit the characteristic power-law emission expected of luminous AGNs. We study the multiwavelength properties of this sample and compare the AGNs selected in this way to those selected via other Spitzer color-color criteria. Only 55% of the power-law galaxies are detected in the X-ray catalog at exposures of >0.5 Ms, although a search for faint emission results in the detection of 85% of the power-law galaxies at the ≥2.5 σ detection level. Most of the remaining galaxies are likely to host AGNs that are heavily obscured in the X-ray. Because the power-law selection requires the AGNs to be energetically dominant in the near- and mid-infrared, the power-law galaxies comprise a significant fraction of the Spitzer-detected AGN population at high luminosities and redshifts. The high 24 μm detection fraction also points to a luminous population. The power-law galaxies comprise a subset of color-selected AGN candidates. A comparison with various mid-infrared color selection criteria demonstrates that while the color-selected samples contain a larger fraction of the X-ray-luminous AGNs, there is evidence that these selection techniques also suffer from a higher degree of contamination by star-forming galaxies in the deepest exposures. Considering only those power-law galaxies detected in the X-ray catalog, we derive an obscured fraction of 68% (2 : 1). Including all of the power-law galaxies suggests an obscured fraction of <81% (4 : 1).